Principal Software Engineer - Mobile at Tripadvisor | Lisbon

Tripadvisor’s Experiences Engineering team is looking for a Principal Software Engineer - Mobile to join the group in Lisbon. This position centers on leading mobile development for customer-facing solutions. The team operates remote-first, but candidates must be able to commute to the Lisbon office within roughly 1.5 hours for occasional meetings. Note: B2B contracts are not offered for this role. Role overview This is a senior technical leadership role focused on mobile app architecture and delivery. The Principal Software Engineer will guide the design and development of scalable mobile systems, ensuring strong performance, reliability, and offline functionality. Collaboration with other engineering teams is key to maintaining quality and consistency across platforms. What you will do Lead the design and architecture of complex mobile applications that power Tripadvisor’s customer-facing products. Run design reviews within the team and across the broader engineering organization, with an emphasis on mobile architecture and platform integration. Champion best practices in release management, app stability, observability, performance monitoring, and incident response to improve mobile operational maturity. Work closely with engineers to deliver reliable, high-quality mobile experiences for travelers and operators worldwide. Team context The Experiences Engineering team manages the platform, mobile apps, and supporting infrastructure across Europe. Their work helps operators grow their businesses, supports third-party integrations, and equips customer service teams to assist travelers globally.

The Tripadvisor Group is dedicated to connecting people with experiences that are truly worth sharing. Our mission is to be the most trusted source for travel and experiences globally. By leveraging our esteemed brands, cutting-edge technology, and extensive capabilities, we connect a worldwide audience with partners through engaging content, expert travel advice, and two-sided marketplaces offering experiences, accommodations, restaurants, and more. The Tripadvisor Experiences Engineering team operates across Europe, overseeing Tripadvisor.com, the Tripadvisor mobile applications, and their supporting infrastructure. We manage the systems that empower operators to expand their businesses and enable third parties to access our extensive inventory. Additionally, we provide essential tools that equip our customer service teams to deliver world-class support to travelers and operators around the globe. We are on the lookout for a Software Engineer II to join our rapidly expanding team. This position is available for candidates residing within a commutable distance (typically up to 2 hours) from one of our office hubs in Lisbon, Saldanha. We embrace flexibility in work arrangements while also valuing the importance of in-person interactions for collaboration and connection. Expect a remote-first working model with occasional in-person gatherings at your closest office for team bonding, strategic planning, or other significant moments. At Tripadvisor, our engineers are adaptable and relish tackling diverse technical challenges. This is primarily a backend-focused full-stack role, where you'll predominantly work on backend tasks, with occasional frontend projects. While a strong desire to learn is essential, prior expertise in frontend development is not a prerequisite; we provide on-the-job training. Within our dynamic environment, our engineers collaborate closely with product managers and designers, engaging in the entire software development lifecycle—from design and coding to testing and deployment. Most of our engineers release code to production every few days, following a daily release cycle. Our tech stack includes Java, React, TypeScript, GraphQL, Kubernetes, SQL, and NoSQL databases, all hosted on AWS. While familiarity with every technology is not mandatory, a strong willingness to learn is crucial. You should have experience with a statically typed, object-oriented programming language such as Java, C#, or C++. Perks of Working at Tripadvisor Competitive compensation packages, including base salary and annual bonuses.

Tripadvisor Experiences (Viator) is looking for a Mid-Level DevSecOps Engineer to help secure its AWS-based platform. This role centers on proactive security engineering and hands-on incident response for a large-scale travel experiences marketplace. Role overview The DevSecOps Engineer II will monitor the AWS cloud environment for security threats, respond to incidents, and automate security processes. Collaboration with engineering teams is a key part of the job, working together to strengthen platform security and ensure safe travel experiences for users worldwide. Key responsibilities Monitor AWS infrastructure for security threats and vulnerabilities Respond to security incidents and support investigations Automate security processes to improve detection and response Work closely with engineering teams to embed security best practices Location This is a hybrid position based in Portugal. Occasional travel to the Lisbon office may be required.

Join the Tripadvisor Group, where we connect people with unforgettable experiences and strive to be the world's most trusted source for travel and adventure. Utilizing our vast portfolio of travel brands and advanced technology, we aim to engage a global audience and facilitate meaningful connections with our partners across diverse travel categories including accommodations, restaurants, and unique experiences. The Tripadvisor Experiences Engineering team, distributed across Europe, plays a pivotal role in managing Tripadvisor.com and our mobile applications, alongside the supporting infrastructure. We empower operators to grow their businesses while enabling third parties to leverage our comprehensive inventory. Our dedicated team provides essential tools that support our customer service representatives in delivering exceptional service to travelers and operators worldwide. We are in search of a Senior Software Engineer to become part of our dynamic team. This position is available to candidates who can commute (generally within a 2-hour radius) to one of our office hubs in Lisbon. We appreciate flexibility in work arrangements and value the importance of in-person interactions for collaboration and connection. Expect a remote-first work model complemented by periodic office gatherings for team planning and engagement. At Tripadvisor, our engineers thrive on tackling a diverse array of technical challenges. This backend-focused full-stack role primarily involves backend development, with opportunities to engage in frontend projects as well. While a willingness to learn is essential, expertise in frontend development is not required at the outset, as we offer on-the-job training. Our collaborative environment is designed for productivity, where engineers work closely with product managers and designers throughout the entire software development lifecycle—from design and coding to testing and deployment. Most engineers deploy code to production every few days within our daily release cycle. The technology stack at Tripadvisor includes Java, React, Typescript, GraphQL, Kubernetes, SQL, and NoSQL databases on AWS. While strong proficiency in Java is mandatory, familiarity with the entire stack is not a prerequisite; a passion for learning is what we value most. Why Work with Us? Competitive compensation packages, including base salary, annual bonuses, and more. “Work your way” approach offering flexibility to cater to your lifestyle and needs.

Join SIXT as we redefine the future of mobility through innovative technology. As a Software Engineering Manager, you will spearhead engineering initiatives for critical platforms that drive our global fleet operations and enhance revenue optimization. Your teams will develop systems for fleet planning, lifecycle management, operational decision-making, and logistics, enabling data-driven strategies across a vast network of vehicles worldwide.In collaboration with product managers, data scientists, analysts, and business stakeholders, you will help design and scale solutions that forecast demand, improve fleet utilization, and facilitate real-time operational decisions. As we modernize our core platforms, your contributions will directly impact operational efficiency, customer satisfaction, and overall business performance within our global mobility ecosystem.YOUR ROLE AT SIXTLead and cultivate high-performing engineering teams, promoting a culture of ownership, continuous improvement, and technical excellence, with a focus on adopting modern software development practices, particularly in AI and agentic engineering.Empower teams to create and deliver scalable, reliable systems while fostering modern engineering practices and robust architectural thinking.Serve as a mentor and coach, guiding autonomous teams in overcoming complex technical and organizational challenges.Collaborate closely with product leaders to shape product vision, translating business challenges into technical solutions that deliver measurable value to customers and the business.Drive execution and delivery of large-scale cross-functional initiatives involving engineering, data science, analytics, and business stakeholders.Balance speed and quality by managing trade-offs between rapid delivery, system scalability, and long-term technical sustainability.

Join TransPerfect, a well-established company with a vibrant start-up culture, as we seek innovative and entrepreneurial spirits to enhance our team. We are in search of a Mobile Engineer to join our global workforce, responsible for developing exceptional user experiences on the iOS and Android platforms. This full-time hybrid role requires both independent and collaborative efforts within a high-impact team dedicated to delivering groundbreaking products.The ideal candidate will possess extensive expertise in creating iOS and Android applications using Flutter, with a strong emphasis on building new components from the ground up.About the TransPerfect TechOps Team:The TechOps team at TransPerfect has played a crucial role in our success over the past decade, providing technology and services that have significantly improved the workflows for our clients and colleagues alike. From enhancing internal processes to developing scalable client interfaces, our team is at the core of the company’s innovative GlobalLink platform.Your responsibilities will include:Acting as the subject matter expert in mobile app development, defining best practices in mobile development and deployment processes.Collaborating with product managers, engineers, designers, and QA teams to create compelling user experiences on iOS and Android platforms.Leading the delivery of major mobile app features, components, and overall solutions in partnership with technical leads and senior engineers.Working in an agile environment to manage internal and external implementation requirements and expectations.Providing constructive feedback to technical staff at all stages of the software lifecycle, ensuring alignment with business needs.Writing clean, efficient, and maintainable code while adhering to industry best practices and coding standards.Staying informed about the latest trends, technologies, and best practices in mobile development.

Role overview airapps is looking for a Mobile Software Architect based in Lisbon. The focus of this position is to design and build mobile applications that deliver strong user experiences and reliable performance. Success in this role depends on technical depth and a hands-on approach to mobile architecture. What you will do Design and implement mobile solutions that prioritize usability and speed Collaborate with teams from different disciplines to ensure technical alignment Establish and uphold architectural standards across mobile projects Mentor junior developers and encourage their professional growth Requirements Extensive experience in mobile application development Strong interest in influencing mobile technology strategy Ability to work with others to address technical challenges Willingness to share expertise and support less experienced engineers

Join our dynamic team at inetum2 as a Software Test Engineer. In this role, you will play a crucial part in ensuring the quality and performance of our software products. You will collaborate with cross-functional teams to identify and resolve software issues, implement testing protocols, and contribute to the overall improvement of our development processes.

SingleStore is seeking a Software Engineer (Graduate) to join its Lisbon office. This position centers on building real-time technology that helps businesses work more efficiently. The engineering team emphasizes teamwork, creativity, and hands-on ownership of projects from the initial idea through deployment. New graduates will collaborate closely with experienced engineers, receiving mentorship and opportunities for professional growth. Cross-functional work with product management, marketing, and sales is a regular part of the role. What you will do Design and improve product features using advanced technologies, including WASM Strengthen cluster fault tolerance for SingleStore deployments Boost SQL query performance with methods such as SIMD and LLVM code generation Create and refine search and costing modules for the query optimizer Contribute to both new and ongoing projects that ship with each release Write and test production software, gaining insight into the product and business operations Requirements Bachelor’s degree in Computer Science, Electrical Engineering, Computer Engineering, or a related discipline Strong grasp of computer science fundamentals, including operating systems, concurrency, multithreading, and server architectures Proficiency in C++ or C Solid understanding of algorithms and data structures Interest in building reliable, robust software Work environment Engineers at SingleStore work in small, collaborative teams and see their contributions go live with every release. The company values celebrating achievements together, both in the office and throughout Lisbon.

Role Overview Trustly is looking for a Senior Software Engineer in Lisbon, Portugal. This role focuses on building and improving payment solutions that help make online transactions smoother and more secure. The team values collaboration and creative problem-solving while working to extend the platform’s features.

NielsenIQ is seeking a talented and experienced Principal Data Scientist to join our dynamic team in Lisbon. In this role, you will leverage your expertise in data science to drive innovative solutions and insights that influence strategic business decisions. You will collaborate with cross-functional teams to develop predictive models, analyze complex data sets, and create actionable insights that support our clients in achieving their objectives.

airapps is looking for a Mobile DevOps Engineer in Lisbon to strengthen its technology team. This position centers on managing and improving deployment workflows for mobile applications. Role overview The Mobile DevOps Engineer will oversee mobile app deployment pipelines, focusing on smooth integration and delivery. The role calls for attention to detail and a drive to streamline processes. Key responsibilities Manage and optimize deployment processes for mobile applications Implement automation to support continuous integration and delivery Work with cloud services to improve operational efficiency Requirements Experience with automation tools and cloud platforms Background in mobile application deployment and integration

About TripadvisorThe Tripadvisor Group connects individuals to unforgettable experiences, aiming to be the most trusted source for travel and adventures globally. Leveraging our extensive brands and technology, we engage our worldwide audience with partners through rich content, insightful travel guidance, and two-sided marketplaces for experiences, accommodations, restaurants, and various travel categories. Tripadvisor, Inc. (Nasdaq: TRIP) encompasses a diverse portfolio of travel brands, including Tripadvisor, Viator, and TheFork.We are seeking a proactive Cloud Security Engineer II (AWS) to serve as the primary defense for the Tripadvisor Experiences platform. This vital mid-level role integrates proactive security engineering with reactive incident response. You will immerse yourself in our cloud environment, continuously monitoring for threats, addressing security incidents, automating defenses, and collaborating with our engineering teams to enhance platform resilience.Job Location: This is a remote or hybrid position based in Portugal. Occasional travel to company offices may be required.

Join our dynamic team at tgs as a Junior Software Engineer where you will play a crucial role in ensuring the quality and execution of our innovative software products. As part of a global technology department, you'll collaborate with a talented and diverse group of professionals located in cities such as Barcelona, New York, London, Manchester, Bucharest, and India. If you're eager to be part of a rapidly growing company and make a meaningful impact, we would love to hear from you!About TransPerfect – TechOps:The TransPerfect TechOps team is integral to our success, having provided essential technology and services for over a decade. We are dedicated to simplifying workflows for our colleagues and delivering core services that empower our clients through the GlobalLink platform, offering scalable interfaces that make complex ecosystems accessible to all users.

Join Gapstars as a Mid-Level Software Engineer!At Gapstars, we pride ourselves on building innovative remote teams across Sri Lanka and Portugal, dedicated to delivering exceptional software solutions for forward-thinking tech companies. Our dynamic team of over 275 TechStars is committed to transforming scalable software into high-performance products that reshape industries. We collaborate with ambitious partners in technology, striving to excel in their respective markets.Role OverviewWe are looking for a Mid-Level Software Engineer who will be instrumental in supporting a rapidly expanding FinTech cloud-based data and analytics platform utilized by leading global market players. Your role will focus on developing reliable, secure, and high-quality systems that facilitate large-scale data distribution, emphasizing hands-on engineering, automation, and data visualization.This is a hybrid role based in Lisbon, Portugal.Key Responsibilities:Contribute to the growth of our FinTech solutions by shaping technology initiatives.Translate high-level business objectives into scalable, architecturally sound solutions leveraging GCP.Develop robust, secure systems, ensuring effective workarounds for service continuity during failures.Plan and execute structured releases to minimize disruptions, with clear rollback strategies.Mentor junior team members, promoting a culture of continuous learning and development.Essential QualificationsAt least 2 years of experience in Python and/or Java.Strong expertise in databases and cloud data warehouses (e.g., SQL, PostgreSQL).

Speechify is looking for a Software Engineer, Platform, to join the team in Lisbon. This position centers on building and refining the core platform that supports how users engage with Speechify’s products. The work directly shapes user experience and drives efficiency throughout the company. What you will do Develop and maintain essential platform features that enable Speechify’s products Collaborate with engineering, product, and design teams to deliver improvements Use modern technologies to create reliable, scalable solutions Share ideas and feedback to influence the platform’s direction Requirements Experience building software platforms or infrastructure Comfort working within collaborative and creative teams Interest in enhancing how people interact with technology Located in Lisbon, Portugal

Become a Part of Our Movement and Enhance Restaurant Culture! At TheFork, we firmly believe that the most memorable experiences happen around the dining table. As Europe’s premier restaurant booking platform, we unite a vast community of dedicated diners with some of the most beloved restaurants in the world. Driven by innovation and a genuine passion for the culinary industry, we curate unique dining experiences across 11 countries.Joining the Tripadvisor Group, we pride ourselves on fostering a diverse, people-centric culture where values such as 'respect', 'ownership', 'growth', and 'collaboration' flourish. If you have a passion for food, technology, and a desire to make a significant impact, we have a place for you at our table. Explore life at TheFork

Join our dynamic team as a Senior Software Engineer where you will leverage your expertise to design and implement robust back-end systems utilizing Java and Spring frameworks. You will play a key role in developing and integrating data from diverse sources to enhance and elevate application performance.Your responsibilities will include optimizing application efficiency to ensure seamless user experiences, troubleshooting and debugging across the entire stack, and staying abreast of emerging technologies to propose innovative solutions. You will also engage in collaborative code reviews to maintain high standards of code quality and best practices.Work closely with product managers, designers, and fellow developers to deliver exceptional software solutions in a timely manner. Your ability to document your work will contribute to our knowledge base and continuous improvement efforts.

Join our global team at tgs as a Software Engineer, where you will play a crucial role in ensuring the quality, development, and implementation of our innovative software solutions.As a key member of our technology department, you will collaborate with a diverse group of talented professionals located in cities such as Barcelona, New York, London, Manchester, Bucharest, and India. If you are eager to join a fast-growing company and make a significant impact, we would love to hear from you!About TransPerfect – TechOps:The TechOps team at TransPerfect has been instrumental in our success over the past decade, providing technology and services that have streamlined processes for both clients and colleagues. From enhancing workflows to building the foundational services of our GlobalLink platform, we create scalable client interfaces that enable users to navigate complex ecosystems effortlessly.

We are seeking enthusiastic and skilled Junior Software Engineers to join our team in crafting innovative SaaS-based solutions aimed at combating money laundering and financial crime. Our mission is to unveil the truth and create a safer world by ensuring that illicit funds do not reach the hands of wrongdoers.As a Junior Software Engineer, you will:Collaborate with a talented team of software engineers.Develop new features that empower our platform to analyze data about individuals, apply machine learning models to classify behaviors, and integrate this with our existing datasets. Your contributions will assist our clients in identifying negative actions, understanding what occurred, and pinpointing when these actions took place.Play a key role in delivering new functionalities and maintaining our platform while we innovate with new technologies and scale our operations.Quickly learn and adapt to the technologies we employ for coding and deploying to Kubernetes.Engage in sprint planning and demonstrate the features you’ve developed to stakeholders.Take ownership of your code quality, ensuring rigorous testing and maintaining system integrity.Follow and propose enhancements to best practices for transitioning code from initial requirements to deployed services in production.Our Tech Stack:We utilize a technology stack optimized for public cloud architectures, particularly AWS and GCP.Kotlin is our primary language for backend services development.Our database technologies include significant use of relational databases like Postgres and a distributed SQL database, Yugabyte.We employ an event-sourced model with Kafka for our communication bus and gRPC for intra-service communication.Modern observability solutions are built on Grafana Cloud, and we utilize ArgoCD for code deployment.We prioritize engineering excellence, striving to deliver the highest quality code and solutions to our customers.